摘要： oracle sql日期比较:在今天之前:select * from up_date where update to_date('2007-09-07 00:00:00','yyyy-mm-dd hh24:mi:ss')select * from up_date where update >= to_date('2007-09-07 00:00:00','yyyy-mm-dd hh24:mi:s... 阅读全文